2008 Fall Meeting: San Francisco, CA - 15-19 December 2008

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H24:	Hydrologic Controls On Ecosystem Function
Sponsor:	Hydrology
CoSponsor:	Biogeosciences
Convener:	Diego A. Riveros-Iregui University of Colorado-Boulder Ramaley N122 Boulder, CO, USA 80309 diego.riverosiregui@myportal.montana.edu Holly R. Barnard Oregon State University 321 Richardson Hall Corvallis, OR, USA 97331 Holly.Barnard@oregonstate.edu Kelly K. Caylor Princeton University E-Quad C319B Princeton, NJ, USA kcaylor@princeton.edu Ryan E. Emanuel Appalachian State University ASU Box 32067 Boone, NC, USA 28608 8282622749 emanuelre@appstate.edu
	0414 0495 1631 1813 1851 .
Description:	The feedbacks between surface hydrology and ecosystem function are of critical importance for both the water and nutrient cycles, yet the interactions among these concurrent processes remain poorly understood. Episodic hydrologic events such as moisture pulses, or conversely, periods of water stress, make many ecosystems particularly sensitive to hydrological change, as seasonal and inter-annual variability of plant and ecosystem function can be especially dependent on the magnitude and timing of moisture inputs. This session invites papers from the hydrological, physiological, and biogeochemical communities to bridge traditional scientific disciplines in order to further our holistic understanding of how moisture inputs propagate into eco(hydro)systems. Topics of interest include investigations of the role that topography, complex terrain and moisture inputs (e.g., rainy season, snowmelt, intermittent water table) play in the interaction between surface hydrology and the exchange of mass, energy and momentum across the soil-plant-atmosphere continuum. Studies employing field-based data collection and innovative methods of analysis and modeling, and papers that consider the complications of working across a range of spatial and temporal scales are encouraged. We seek contributions that take an integrative approach to exploring coupled ecological-hydrological processes from hillslope to basin scales. This session is intended to stimulate discussion, comparison, and context of hydrologic controls on ecosystem function across moisture-controlled ecosystems.

Union Sessions by Theme

There are no extra requirements to submit to these sessions.

1. Carbon in the Earth System

U01: Origin of Late Holocene (Pre-Industrial) Increases in Atmospheric CO₂ and CH₄

U04: Understanding of the Global Carbon Cycle Using Models and Observations

U15: Global Climate Change and Gas Hydrate Reservoir Degassing: Assessing the Scientific Evidence

U22: Geologic Carbon Sequestration: The Vital Links Between Risk Assessment, Monitoring and Mitigation Design

2. Earth's Polar Regions

U02: The International Polar Year

U23: Observing, Understanding, Predicting and Responding to Pan-Arctic Ice Retreat Problems

3. Climate & the Environment

U06: Geoengineering to Counteract Global Warming?

U10: Tropical Cyclone—Climate Interactions Past, Present, and Future

U11: Comparative Climate Studies of Earth, Venus and Mars

U12: Consequences of Peak Oil for Climate Change

U14: Environmental Consequences of the Changing Global Food System

U24: Perspectives on the Past and Future of Paleoceanography and Paleclimatology

4. Earth's Dynamic Interior

U09: Different Views on One Asthenosphere

U18: Interaction and Co-evolution of Earth Reservoirs: Coupling of Mantle, Tectonic, Atmospheric, and Hydrospheric Dynamics in the Evolution of Earth

U20: Fluids at Convergent Margins: Synthesis of Observations, Experiments and Models

U21: Geologic, Seismologic, and Geodynamic Constraints on the 4–D Evolution of North America: Where are we now and Where are we going?

5. New Frontiers

U03: MESSENGER at Mercury: The Second Flyby

U05: Episodic Tremor and Slip: Insights into a Newly Discovered Process

U08: The Library — Data Center Alliance in Earth and Space Sciences

U13: The Phoenix Mission

U16: The Van Allen Radiation Belts and Their Impact on Modern Space Science

6. Hazards and Public Risk

U07: Role of Science in Water, Biologic, and Geologic Hazards Security

U17: Decision Support Needs and Tools for Global Change: Bridging the Gap Between Physical and Societal Models

U19: The Great 2008 Wenchuan Earthquake: A Multi-disciplinary View

U25: Integrated Geohazards Along Continental Margins and Plate Boundary Zones